Some properties of peanut clump, a newly discovered virus

Abstract

SUMMARY A mechanically transmissible soil‐borne virus causing peanut clump disease in Upper Volta is described. It infected mainly species of Chenopodia‐ceae and was propagated in Chenopodium amaranticolor. Infectivity was lost from sap of C. amaranticolor after 10 min at 64 °C, and after dilution to 10 ‐5 but not io ‐4 . A purification procedure is described. The particles are rod‐shaped and of two predominant lengths, 190 and 245 nm. The virus is not serologically related to tobacco rattle, pea early‐browning, or soil‐borne wheat mosaic viruses, or to a virus associated with a rhizomania‐like disease of beet.